Distribution for the projected stellar half-mass radius ($r_{50}^{\mathrm{cen}}$), halo mass (M₂₀₀), halo concentration (R₂₀₀/R_s), and the dimensionless spin parameter (λ; from left to right). The colour code is the same as in Fig. 2. In each panel, vertical lines indicate the median of each distribution (in their respective colours), and the black arrow in the first panel indicates the half-light radius of the Milky Way.